<template>
  <div class="validate-input-container pb-3">
    <input v-if="tag != 'textarea'" class="form-control" :class="{ 'is-invalid': inputRef.error }" :value="inputRef.val"
      @blur="validateInput" @input="updateValue" v-bind="$attrs">
    <textarea v-else class="form-control" :class="{ 'is-invalid': inputRef.error }" :value="inputRef.val"
      @blur="validateInput" @input="updateValue" v-bind="$attrs">
    </textarea>
    <span v-if="inputRef.error" class="invalid-feedback">{{ inputRef.message }}</span>
  </div>
</template>

<script lang="ts">
import { defineComponent, reactive, PropType, onMounted, onUpdated } from 'vue'
import { emitter } from './ValidateForm.vue'
const emailReg = /^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/
interface RuleProp {
  type: 'required' | 'email' | 'custom';
  message: string;
  validator?: () => boolean;
}
export type RulesProp = RuleProp[]
export type TagType = 'input' | 'textarea'
export default defineComponent({
  props: {
    rules: Array as PropType<RulesProp>,
    modelValue: String,
    tag: {
      type: String as PropType<TagType>,
      default: 'input'
    }
  },
  inheritAttrs: false,
  setup(props, context) {
    const inputRef = reactive({
      val: props.modelValue || '',
      error: false,
      message: ''
    })
    //v-model双向绑定
    const updateValue = (e: KeyboardEvent) => {
      const targetValue = (e.target as HTMLInputElement).value
      inputRef.val = targetValue
      context.emit('update:modelValue', targetValue)
    }
    //表单验证
    const validateInput = () => {
      if (props.rules) {
        const allPassed = props.rules.every(rule => {
          let passed = true
          inputRef.message = rule.message
          switch (rule.type) {
            case 'required':
              passed = (inputRef.val.trim() !== '')
              break
            case 'email':
              passed = emailReg.test(inputRef.val)
              break
            case 'custom':
              passed = rule.validator ? rule.validator() : true
              break
            default:
              break
          }
          return passed
        })
        inputRef.error = !allPassed
        return allPassed
      }
      return true
    }
    onMounted(() => {//将验证结果发送给ValidateForm组件
      emitter.emit('form-item-created', validateInput as any)
    })

    return {
      inputRef,
      validateInput,
      updateValue
    }
  }
})
</script>
